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Sulphonyl isocyanates, addition

The cyclic addition of sulphonyl isocyanates to S4N4 has been shown. The monoaddition product (27) is formed without exception and is explained by... [Pg.360]

In a related piece of work, imidazolines have been prepared from A -chloro-N-phenyl amidines and enamines. (Scheme 79). Pyrazomycins have been synthesized by the Roche group, the key step being the preparation of the pyrazolone ring by the addition of toluene- -sulphonyl azide to the anion from diethyl acetone dicarboxylate (Scheme 80). Imidazolidines (201) have been prepared by the action of isocyanates and isothiocyanates with an aziridine ester a dipolar intermediate is implicated. Imidazolidine-4,5-diones have been prepared by the... [Pg.241]


See other pages where Sulphonyl isocyanates, addition is mentioned: [Pg.394]    [Pg.550]    [Pg.70]    [Pg.143]    [Pg.449]    [Pg.77]    [Pg.412]    [Pg.316]    [Pg.42]    [Pg.352]   


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Isocyanate addition

Isocyanates, addition isocyanate

Sulphonyl

Sulphonyl isocyanates

Sulphonylation

Sulphonylations

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